If anyone is interested in discussions on race, Blackness, and social hierarchies in the American context that are less technical and widely accessible, this podcast series looks like a good resource.
Historical Blackness on TWIB with Historian Blair Kelley (iTunes Store link)
You can listen to the episode “What is Race” here. (It opens with examples from Charles Mills’ Blackness Visible). This episode sounded like it could be a good classroom resource (undergrad or grad) as a conversation starter or an introduction to how philosophy, history, and political theory intersect on the topic.